Usually Big Rig Trucks drive around the Minneapolis Convention Center, but for the next few days, they are driving through it. The National Truck Driving Championship got underway today with some 400 competitors vying for the title of safest driver. The competition tests driver's safety knowledge and their skill in manuevering their massive machinery in delicate situations. David Bowers placed 13th in last year's competition in the 3-axle class. He's been practicing every weekend since March in the hopes of winning this year's event.